Cialis is here. The soft sell.
D002243:Carbolines / Q000627:therapeutic use*; D003132:Commerce; D004345:Drug Industry; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D007093:Imidazoles / Q000627:therapeutic use*; D008297:Male; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D000068581:Tadalafil; D014227:Triazines; D014481:United States; D000069058:Vardenafil Dihydrochloride
D002243:Carbolines; D007093:Imidazoles; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014227:Triazines; D000069058:Vardenafil Dihydrochloride; D000068581:Tadalafil; D000068677:Sildenafil Citrate